"What was that?" Peter exclaimed in shock, looking around uncertainly. On the top step of the staircase stood a man in a black cloak. His eyes were covered with a mask, and he held a long saber in his hand. "Death to the king!" he shouted. At Dragon Rock Castle, knightly games are taking place, featuring a variety of exciting competitions. The winner stands to gain a lot of money and the king's daughter. However, not everyone fights fairly. Soon, the three ??? are on the trail of a dangerous black knight, and the duel begins.